encoder/null: convert to C++

1 files changed, 122 insertions, 0 deletions

diff --git a/src/encoder/NullEncoderPlugin.cxx b/src/encoder/NullEncoderPlugin.cxx
new file mode 100644
index 000000000..bdfab1563
--- /dev/null
+++ b/src/encoder/NullEncoderPlugin.cxx
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "NullEncoderPlugin.hxx"
+#include "encoder_api.h"
+#include "encoder_plugin.h"
+#include "util/fifo_buffer.h"
+extern "C" {
+#include "util/growing_fifo.h"
+}
+#include "gcc.h"
+
+#include <glib.h>
+
+#include <assert.h>
+#include <string.h>
+
+struct NullEncoder final {
+	struct encoder encoder;
+
+	struct fifo_buffer *buffer;
+
+	NullEncoder() {
+		encoder_struct_init(&encoder, &null_encoder_plugin);
+	}
+};
+
+static struct encoder *
+null_encoder_init(gcc_unused const struct config_param *param,
+		  gcc_unused GError **error)
+{
+	NullEncoder *encoder = new NullEncoder();
+	return &encoder->encoder;
+}
+
+static void
+null_encoder_finish(struct encoder *_encoder)
+{
+	NullEncoder *encoder = (NullEncoder *)_encoder;
+
+	delete encoder;
+}
+
+static void
+null_encoder_close(struct encoder *_encoder)
+{
+	NullEncoder *encoder = (NullEncoder *)_encoder;
+
+	fifo_buffer_free(encoder->buffer);
+}
+
+
+static bool
+null_encoder_open(struct encoder *_encoder,
+		  gcc_unused struct audio_format *audio_format,
+		  gcc_unused GError **error)
+{
+	NullEncoder *encoder = (NullEncoder *)_encoder;
+	encoder->buffer = growing_fifo_new();
+	return true;
+}
+
+static bool
+null_encoder_write(struct encoder *_encoder,
+		   const void *data, size_t length,
+		   gcc_unused GError **error)
+{
+	NullEncoder *encoder = (NullEncoder *)_encoder;
+
+	growing_fifo_append(&encoder->buffer, data, length);
+	return length;
+}
+
+static size_t
+null_encoder_read(struct encoder *_encoder, void *dest, size_t length)
+{
+	NullEncoder *encoder = (NullEncoder *)_encoder;
+
+	size_t max_length;
+	const void *src = fifo_buffer_read(encoder->buffer, &max_length);
+	if (src == nullptr)
+		return 0;
+
+	if (length > max_length)
+		length = max_length;
+
+	memcpy(dest, src, length);
+	fifo_buffer_consume(encoder->buffer, length);
+	return length;
+}
+
+const struct encoder_plugin null_encoder_plugin = {
+	"null",
+	null_encoder_init,
+	null_encoder_finish,
+	null_encoder_open,
+	null_encoder_close,
+	nullptr,
+	nullptr,
+	nullptr,
+	nullptr,
+	null_encoder_write,
+	null_encoder_read,
+	nullptr,
+};